<!DOCTYPE html> <html> <head> <meta charset=utf-8> <style> div { padding: 5px; display: inline-block; } .vlr { writing-mode: vertical-lr; text-orientation: sideways; } .vrl { writing-mode: vertical-rl; text-orientation: sideways; } .slr { writing-mode: sideways-lr; } .srl { writing-mode: sideways-rl; } span { display: inline-block; block-size: 2em; vertical-align: middle; } span:nth-child(1) { background: red; inline-size: 1em; } span:nth-child(2) { background: orange; inline-size: 1.1em; } span:nth-child(3) { background: yellow; inline-size: 1.3em; } span:nth-child(4) { background: green; inline-size: 1.5em; } span:nth-child(5) { background: blue; inline-size: 1.7em; } span:nth-child(6) { background: indigo; inline-size: 1.9em; } span:nth-child(7) { background: violet; inline-size: 2em; } </style> </head> <body> <p>All four columns should look the same: <div dir=rtl class="vrl"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></div> <div dir=rtl class="vlr"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></div> <div dir=rtl class="srl"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></div> <div dir=ltr class="slr"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></div>